What do you call a person with no arms?
Armless.
No, it's harmless.
What do you call a person with no arms?
Armless.
No, it's harmless.
Listen, you clearly don't grasp the nuances of comedy. You think saying "armless" is the end of the line, but it's not! The joke is about the similar sound of "armless" and "harmless", that is, a homophone, creating a play on words. It's supposed to be unexpected, get it? You probably think "armless" is just a description.
Balls
*picks up gun with foot*